/*
- * linux/arch/ppc64/kernel/signal.c
- *
* PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* 2 of the License, or (at your option) any later version.
*/
-#include <linux/config.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <asm/pgtable.h>
#include <asm/unistd.h>
#include <asm/cacheflush.h>
+#include <asm/syscalls.h>
#include <asm/vdso.h>
#define DEBUG_SIG 0
struct ucontext uc;
unsigned long _unused[2];
unsigned int tramp[TRAMP_SIZE];
- struct siginfo *pinfo;
- void *puc;
+ struct siginfo __user *pinfo;
+ void __user *puc;
struct siginfo info;
/* 64 bit ABI allows for 288 bytes below sp before decrementing it. */
char abigap[288];
} __attribute__ ((aligned (16)));
-
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-long sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize, int p3, int p4,
- int p6, int p7, struct pt_regs *regs)
-{
- sigset_t saveset, newset;
-
- /* XXX: Don't preclude handling different sized sigset_t's. */
- if (sigsetsize != sizeof(sigset_t))
- return -EINVAL;
-
- if (copy_from_user(&newset, unewset, sizeof(newset)))
- return -EFAULT;
- sigdelsetmask(&newset, ~_BLOCKABLE);
-
- spin_lock_irq(¤t->sighand->siglock);
- saveset = current->blocked;
- current->blocked = newset;
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
-
- regs->result = -EINTR;
- regs->gpr[3] = EINTR;
- regs->ccr |= 0x10000000;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(&saveset, regs)) {
- set_thread_flag(TIF_RESTOREALL);
- return 0;
- }
- }
-}
-
long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, unsigned long r5,
unsigned long r6, unsigned long r7, unsigned long r8,
struct pt_regs *regs)
err |= __put_user(0, &sc->v_regs);
#endif /* CONFIG_ALTIVEC */
err |= __put_user(&sc->gp_regs, &sc->regs);
- if (!FULL_REGS(regs)) {
- /* Zero out the unsaved GPRs to avoid information
- leak, and set TIF_SAVE_NVGPRS to ensure that the
- registers do actually get saved later. */
- memset(®s->gpr[14], 0, 18 * sizeof(unsigned long));
- set_thread_flag(TIF_SAVE_NVGPRS);
- current_thread_info()->nvgprs_frame = &sc->gp_regs;
- }
+ WARN_ON(!FULL_REGS(regs));
err |= __copy_to_user(&sc->gp_regs, regs, GP_REGS_SIZE);
err |= __copy_to_user(&sc->fp_regs, ¤t->thread.fpr, FP_REGS_SIZE);
err |= __put_user(signr, &sc->signal);
unsigned long err = 0;
unsigned long save_r13 = 0;
elf_greg_t *gregs = (elf_greg_t *)regs;
-#ifdef CONFIG_ALTIVEC
unsigned long msr;
-#endif
int i;
/* If this is not a signal return, we preserve the TLS in r13 */
err |= __copy_from_user(regs, &sc->gp_regs,
PT_MSR*sizeof(unsigned long));
- /* skip MSR and SOFTE */
+ /* get MSR separately, transfer the LE bit if doing signal return */
+ err |= __get_user(msr, &sc->gp_regs[PT_MSR]);
+ if (sig)
+ regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE);
+
+ /* skip SOFTE */
for (i = PT_MSR+1; i <= PT_RESULT; i++) {
if (i == PT_SOFTE)
continue;
#ifdef CONFIG_ALTIVEC
err |= __get_user(v_regs, &sc->v_regs);
- err |= __get_user(msr, &sc->gp_regs[PT_MSR]);
if (err)
return err;
+ if (v_regs && !access_ok(VERIFY_READ, v_regs, 34 * sizeof(vector128)))
+ return -EFAULT;
/* Copy 33 vec registers (vr0..31 and vscr) from the stack */
if (v_regs != 0 && (msr & MSR_VEC) != 0)
err |= __copy_from_user(current->thread.vr, v_regs,
/* Default to using normal stack */
newsp = regs->gpr[1];
- if (ka->sa.sa_flags & SA_ONSTACK) {
+ if ((ka->sa.sa_flags & SA_ONSTACK) && current->sas_ss_size) {
if (! on_sig_stack(regs->gpr[1]))
newsp = (current->sas_ss_sp + current->sas_ss_size);
}
current->thread.fpscr.val = 0;
/* Set up to return from userspace. */
- if (vdso64_rt_sigtramp && current->thread.vdso_base) {
- regs->link = current->thread.vdso_base + vdso64_rt_sigtramp;
+ if (vdso64_rt_sigtramp && current->mm->context.vdso_base) {
+ regs->link = current->mm->context.vdso_base + vdso64_rt_sigtramp;
} else {
err |= setup_trampoline(__NR_rt_sigreturn, &frame->tramp[0]);
if (err)
/* Set up "regs" so we "return" to the signal handler. */
err |= get_user(regs->nip, &funct_desc_ptr->entry);
+ /* enter the signal handler in big-endian mode */
+ regs->msr &= ~MSR_LE;
regs->gpr[1] = newsp;
err |= get_user(regs->gpr[2], &funct_desc_ptr->toc);
regs->gpr[3] = signr;
if (test_thread_flag(TIF_32BIT))
return do_signal32(oldset, regs);
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = ¤t->saved_sigmask;
+ else if (!oldset)
oldset = ¤t->blocked;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
+ int ret;
+
/* Whee! Actually deliver the signal. */
if (TRAP(regs) == 0x0C00)
syscall_restart(regs, &ka);
if (current->thread.dabr)
set_dabr(current->thread.dabr);
- return handle_signal(signr, &ka, &info, oldset, regs);
+ ret = handle_signal(signr, &ka, &info, oldset, regs);
+
+ /* If a signal was successfully delivered, the saved sigmask is in
+ its frame, and we can clear the TIF_RESTORE_SIGMASK flag */
+ if (ret && test_thread_flag(TIF_RESTORE_SIGMASK))
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+
+ return ret;
}
if (TRAP(regs) == 0x0C00) { /* System Call! */
regs->result = 0;
}
}
+ /* No signal to deliver -- put the saved sigmask back */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL);
+ }
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff